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GCSE Design and Technology · key term
A colouring substance that changes colour in response to a change in temperature.
Used by AQA
Paper 1
Revise: Smart materialsA thermochromic pigment changes colour as its temperature changes. It can be incorporated into a product or applied in a coating, so the surface becomes an indicator of temperature.
Link the material, stimulus, property change and benefit: a thermochromic pigment changes colour with temperature, giving a visible warning that bath water may be too hot.
Distinguish thermochromic pigments, triggered by temperature, from photochromic pigments, triggered by UV light.
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